Why not? People feel more accomplished when they work on their own projects, right? 

[ At least...that's what she's been told because it's not like she's got any personal experience with feeling a sense of accomplishment after finishing up her own projects. ]

And it's not like you're going to be sticking your entire body in there, Eddie. Besides, I think the most flammable part of you is your hair and I know you're not going to be silly enough to stick your head in there. 

[ Before stepping aside she passes him some goggles before slipping her own over her eyes. The coals in the furance are already burning bright, the heat from it rolling off them in waves. ] 

We'll know it's hot enough when it's yellow.